Bogen TBL1S Transformer Balanced Input Module

Designed for reliable audio integration in security, surveillance and paging systems, the Bogen TBL1S Transformer Balanced Input Module delivers clean, professional line-level inputs that protect signal integrity and simplify system control. This transformer-isolated input module accepts balanced sources and offers jumper-selectable impedance (600 Ω or 10 kΩ) plus a -11 dB to +19 dB gain/trim for quick matching to microphones, mixers or external audio devices. Built-in VOX/gating and four priority levels allow high-priority alarms or live pages to mute lower-priority sources automatically, while an adjustable ducking range (-10 dB to -72 dB) and fade-back ensure announcements remain clear without abrupt audio jumps. Outputs can be assigned to either or both mixing buses for flexible zoned distribution, and pluggable screw terminals simplify field wiring in control panel modules. Ideal for integrators and AV/security professionals who need dependable audio routing and event-driven muting in monitoring and access control environments. Add the Bogen TBL1S to your security or PA system to improve announcement clarity and system responsiveness—contact sales for integration support or place your order today.

• Preserves audio integrity with transformer-isolated, line-level input for noise-free connections in security and paging systems
• Flexible integration with selectable 600 Ω or 10 kΩ input impedance and -11 dB to +19 dB gain for easy matching to source equipment
• Priority routing and VOX/gating let urgent announcements override lower-priority sources for reliable alarm and paging control
• Variable ducking (-10 dB to -72 dB) and adjustable fade-back keep background audio intelligible during priority messages
• Assignable outputs to two mixing buses and pluggable screw terminals speed installation and zoning in control panels
• Four user-selectable priority levels and mute send/receive simplify system design for surveillance, monitoring, and public address applications